US10778018B2ActiveUtilityPatentIndex 48

Charging protection method and apparatus

Assignee: HUAWEI TECH CO LTDPriority: Dec 31, 2014Filed: Feb 1, 2019Granted: Sep 15, 2020

Est. expiryDec 31, 2034(~8.5 yrs left)· nominal 20-yr term from priority

H02J 7/65H02J 7/62H02J 7/663H02J 7/90H02J 7/60H02H 5/04H02J 7/00H02H 3/20H02H 7/18H02J 7/345H02H 5/041G08B 21/18H02J 7/04H02J 7/0031H02J 7/0047H02J 7/0029H02J 7/00304

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Claims

Abstract

Embodiments of the present invention provide a charging protection method, including: measuring a charging voltage, a charging current, and a temperature rise of a charging interface of a charged device; detecting whether the charging voltage falls beyond a preset voltage range, detecting whether the charging current is less than a preset current threshold, and detecting whether the temperature rise is greater than a preset temperature rise threshold; and if a detection result of any one or more of the three items is yes, disconnecting a charging circuit of a charger. Correspondingly, the embodiments of the present invention further provide a charging protection apparatus, which can disconnect a charging circuit in a timely manner when a charging exception occurs, thereby avoiding damage to a charging interface.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
       1. A charging system, comprising:
 a device; and 
 a charger configured to supply charging power to charge the device; 
 wherein the device is configured to:
 measure a charging voltage, a charging current, and a temperature rise of a charging interface of the device when the charger and the device are connected;
 detect whether the charging voltage is in a preset voltage range; 
 detect whether the charging current is less than a preset current threshold; 
 detect whether the temperature rise is greater than a preset temperature rise threshold; and 
 disconnect a charging circuit of the charger when at least one of the following conditions is met: 
 
 the charging voltage is not in the preset voltage range; 
 the charging current is less than the preset current threshold; or 
 the temperature rise is greater than the preset temperature rise threshold. 
 
 
     
     
       2. The charging system according to  claim 1 , wherein the charging voltage is a voltage on a data pin of the charging interface of the device, or the charging voltage is a voltage on an identity (ID) pin of the charging interface of the device. 
     
     
       3. The charging system according to  claim 1 , wherein the device is further configured to:
 control a current transmitted, by the charger, on the charging interface to be grounded using a metal oxide semiconductor (MOS) transistor. 
 
     
     
       4. The charging system according to  claim 1 , wherein the device is further configured to:
 send circuit disconnection instruction information to the charger, wherein the circuit disconnection instruction information instructs the charger to disconnect the charging circuit. 
 
     
     
       5. The charging system according to  claim 1 , wherein the device is further configured to:
 control a current transmitted, by the charger, on the charging interface to be grounded using a metal oxide semiconductor (MOS) transistor when the charger fails to disconnect the charging circuit. 
 
     
     
       6. The charging system according to  claim 1 , wherein the device comprises a display screen, wherein the device is further configured to:
 display text information indicating that a charging exception occurs via the display screen. 
 
     
     
       7. The charging system according to  claim 1 , wherein the device comprises an audio apparatus, wherein the device is further configured to:
 output audio information indicating that a charging exception occurs via the audio apparatus. 
 
     
     
       8. A charging protection apparatus, comprising a voltage detector, a current detector, a temperature detector, and a charging manager, wherein
 the voltage detector is connected to a charging interface of a device, and the voltage detector is configured to detect whether a charging voltage of the charging interface belongs to a preset voltage range when a charger and the device are connected; 
 the current detector is connected to the charging interface of the device, and the current detector is configured to detect whether a charging current is less than a preset current threshold when the charger and the device are connected; 
 the temperature detector is connected to a temperature sensor located near the charging interface, and the temperature detector is configured to obtain a temperature measured by the temperature sensor, and detect whether a temperature rise is greater than a preset temperature rise threshold; and 
 the charging manager is connected to the voltage detector, the current 
 detector, and the temperature detector, and is configured to disconnect a charging circuit of the charger when at least one of the following conditions is met: 
 the charging voltage is not in the preset voltage range; 
 the charging current is less than the preset current threshold; or
 the temperature rise is greater than the preset temperature rise threshold. 
 
 
     
     
       9. The charging protection apparatus according to  claim 8 , wherein the charging voltage is a voltage on a data pin of the charging interface of the device, or the charging voltage is a voltage on an identity (ID) pin of the charging interface of the device. 
     
     
       10. The charging protection apparatus according to  claim 8 , wherein the device is further configured to:
 control a current transmitted, by the charger, on the charging interface to be grounded using a metal oxide semiconductor (MOS) transistor. 
 
     
     
       11. The charging protection apparatus according to  claim 8 , wherein the charging manager is further configured to:
 send instruction information to the charger, wherein the instruction information instructs the charger to disconnect the charging circuit. 
 
     
     
       12. The charging protection apparatus according to  claim 11 , wherein the device is further configured to:
 control a current transmitted, by the charger, on the charging interface to be grounded by using a metal oxide semiconductor (MOS) transistor when the charger fails to disconnect the charging circuit. 
 
     
     
       13. The charging protection apparatus according to  claim 8 , wherein the charging manager is further configured to: send alarm prompt information to a charged device. 
     
     
       14. An electronic device, comprising a charging protection apparatus and a charging interface, wherein the charging protection apparatus is configured to:
 measure a charging voltage, and a temperature rise of the charging interface of the electronic device when a charger and the electronic device are connected; 
 detect whether the charging voltage is in a preset voltage range; 
 detect whether the temperature rise is greater than a preset temperature rise threshold; and 
 disconnect a charging circuit of the charger when at least one of the following conditions is met: 
 the charging voltage is not within to a preset voltage range; or 
 the temperature rise is greater than a preset temperature rise threshold. 
 
     
     
       15. The electronic device according to  claim 14 , wherein the charging voltage is a voltage on a data pin of a charging interface of the electronic device, or the charging voltage is a voltage on an identity (ID) pin of the charging interface of the electronic device. 
     
     
       16. The electronic device according to  claim 14 , wherein the charging protection apparatus is further configured to:
 control a current transmitted, by the charger, on the charging interface to be grounded by using a metal oxide semiconductor (MOS) transistor. 
 
     
     
       17. The electronic device according to  claim 14 , wherein the charging protection apparatus is further configured to:
 send circuit disconnection instruction information to the charger, wherein the circuit disconnection instruction information instructs the charger to disconnect the charging circuit. 
 
     
     
       18. The electronic device according to  claim 17 , wherein the charging protection apparatus is further configured to:
 control a current transmitted, by the charger, on the charging interface to be grounded by using a metal oxide semiconductor (MOS) transistor when the charger fails to disconnect the charging circuit. 
 
     
     
       19. The electronic device according to  claim 14 , wherein the electrical device comprises at least one of a display screen or an audio apparatus; wherein
 the display screen is configured to display text information indicating that a charging exception occurs on the electrical device, and 
 the audio apparatus is configured to output audio information indicating that a charging exception occurs on the electrical device. 
 
     
     
       20. The electronic device according to  claim 14 , wherein the charging protection apparatus is configured to:
 measure a charging current of the charging interface of the electrical device when the charger and the electronic device are connected; 
 detect whether the charging current is less than a preset current threshold; and 
 disconnect the charging circuit of the charger when at least one of the following conditions is met: 
 the charging voltage is not in a preset voltage range; 
 the charging current is less than the preset current threshold; or 
 the temperature rise is greater than a preset temperature rise threshold.

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